RC area-response curves for patch gratings for phase-reversed feedback.

Normalized and unnormalized RC responses for different synapses weights between PYs and dLGN neurons, ranging from 0 (without feedback) to 6 nS, and for the two feedback spatial kernels: 1 × 1 and 2 × 2. Values shown for the synaptic weights represent the sum of all individual synaptic conductances of the same type converging to a given cell, i.e., for the 2 × 2 kernel, the value of every monosynaptic connection is the value depicted here divided by 4. The primary vertical axis of every panel (on the left) shows the values of the unnormalized response and the secondary vertical axis (on the right), the values of the normalized response, as shown for the panel in the first row and first column.